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Inorganic matter in rice husk derived carbon and its effect on the capacitive performance 认领 引用 被引量：2
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作者 Wanlu Li Meruyert Nazhipkyzy Teresa J.Bandosz 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第6期639-649,I0016,共11页
Porous carbons were obtained from rice husk using two different chemical activation methods and they were investigated as supercapacitors.Their properties were studied using X-ray photoelectron spectroscopy,thermal an... Porous carbons were obtained from rice husk using two different chemical activation methods and they were investigated as supercapacitors.Their properties were studied using X-ray photoelectron spectroscopy,thermal analysis,potentiometric titration,and nitrogen adsorption isotherm.The specific capacitance measured in both H2 SO4 and KOH electrolytes in two-electrode cell was up to-150 F/g.The activation method used affected the resulting carbons’features.As expected,the dependence of the capacitance on porosity was found.The ash content reached 36 wt.%and that inorganic mater blocked some pores and limited their accessibility to electrolyte ions and increased the charge transfer resistance.Nevertheless,the main ash constituents such as CaCO3,MgCO3,Ca3(PO4)2(or P2O5),and Fe-and Zn-containing species did not affect the specific capacitance to a large extent.Especially SiO2,even in a relatively large amount(~20 wt.%)T did not play a detrimental role in the capacitance behavior.The results showed that in spite of a high ash content,carbon can exhibit a good capacitive performance provided that it has a favorable porosity and is rich in sp2 configurations. 展开更多
关键词 Inorganic matter Capacitive performance SiO2 Carbonates Pore accessibility
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Capacitance Performances of Supramolecular Hydrogels Based on Conducting Polymers 认领 引用 被引量：1
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作者 Ting-yang Dai Rong Tang +2 位作者 Xiao-xiao Yue Liang Xu 陆云 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2015年第7期1018-1027,共10页
The capacitance performances of poly（3,4-ethylenedioxythiophene）-poly（styrenesulfonate）（PEDOT-PSS） supramolecular hydrogels have been investigated systematically. The materials show a specific capacitance of 67 ... The capacitance performances of poly（3,4-ethylenedioxythiophene）-poly（styrenesulfonate）（PEDOT-PSS） supramolecular hydrogels have been investigated systematically. The materials show a specific capacitance of 67 F/g and display excellent rate capability at the scan rate as high as 5000 m V/s in the cyclic voltammogram measurements, accompanied by good cycle stability. On the basis of the measurements of the microscale morphologies, specific areas and electrical conductivities, the mechanisms for the improvement of the electrochemical properties are discussed and ascribed to the novel porous microstructures of the hydrogels and the synergetic effect of the rigid PEDOT and soft PSS components. Furthermore, polyaniline（PAn） is compounded with the PEDOT-PSS hydrogels through an interfacial polymerization process, endowing the hydrogel materials with a higher specific capacitance of 160 F/g at the scan rate of 5000 m V/s. The significance of this work lies in the demonstration of a novel method to solve the problems of conducting polymers in electrochemical applications. 展开更多
关键词 Conducting polymers Hydrogels Capacitance performances Rate capability Supercapacitors
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Hierarchical MnCo2O4@NiMoO4as free-standing core-shell nanowire arrays with synergistic effect for enhanced supercapacitor performance 认领 引用 被引量：6
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作者 Jaafar Abdul-Aziz Mehrez Kwadwo Asare Owusu +4 位作者 Qiang Chen Lun Li Khawla Hamwi Wen Luo Liqiang Mai 《Inorganic Chemistry Frontiers》 SCIE EI 2019年第3期857-865,共9页
The unique synergistic effect of hierarchical core-shell structures demonstrates great potential for designing the next-generation electrode materials for supercapacitors.In this work,we design binderfree MnCo2O_(4... The unique synergistic effect of hierarchical core-shell structures demonstrates great potential for designing the next-generation electrode materials for supercapacitors.In this work,we design binderfree MnCo2O4@NiMoO4heterostructure core-shell nanowire arrays(NWAs)grown over a current collector of nickel foam(NF)achieved through a modified and simple hydrothermal process.The capacitive performance of the core MnCo2O4NWAs was remarkably improved by growing a layer of NiMoO4nanosheets(1244 F g-1at 1 A g-1),which is superior to the capacitance of pristine MnCo2O4(457.85 F g-1at 1 A g-1).Moreover,the prepared MnCo2O4@NiMoO4core-shell NWAs have been used along with commercial activated carbon(AC)to fabricate an asymmetric full supercapacitor device.MnCo2O4@NiMoO4//AC delivers a high energy density(42 W h kg-1)at a power density of 852.3 W kg-1and a good cyclability with 93%of the initial capacitance retained at the end of 8000 successive charge/discharge cycles.Therefore,the MnCo2O4@NiMoO4electrode material holds a great promise as a suitable candidate for high performance supercapacitors. 展开更多
关键词 hierarchical core shell structures capacitive performance nickel foam nf achieved hydrothermal processthe current collector supercapacitor performance synergistic effect
A bi-As-capped and tetra-V-substituted arsenomolybdate:synthesis,structure,capacitive and electrocatalytic properties 认领 引用
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作者 Shuang-Hong Ge Li-Ping Cui +4 位作者 Kai Yu Mei-Lin Wang Chun-Mei Wang Lian-Xin Guo Bai-Bin Zhou 《Tungsten》 EI CSCD 2023年第2期270-276,共7页
A bi-As-capped and tetra-V-substituted arsenomolybdate(Hbib)2(biyb)3[AsⅢ2AsⅤMoⅥ8VⅤ4O40]2·H2O(1)(bib=1.4-Bis(imidazoly)butane;biyb=1,4-bis(imidazol-1-ylmethyl)benzene)has been ... A bi-As-capped and tetra-V-substituted arsenomolybdate(Hbib)2(biyb)3[AsⅢ2AsⅤMoⅥ8VⅤ4O40]2·H2O(1)(bib=1.4-Bis(imidazoly)butane;biyb=1,4-bis(imidazol-1-ylmethyl)benzene)has been constructed through hydrothermal methods and characterized by conventional method.Compound 1 is a tetra-V substituted{AsMoⅥ8VⅤ4O4}polyanions capped by two AsⅢcations at two symmetrical ditch in{AsO4}rectangular pyramid geometry.It exhibits higher specific capacitance,capacitance retention,and electrocatalytic activities for oxidizing ascorbic acid and reducing peroxide hydrogen. 展开更多
关键词 Arsenomolybdate Crystal structure Hydrothermal synthesis Capacitive performence Electrocatalytic nronerty
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